<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <script type="application/javascript"></script>
    <link href="https://fastly.jsdelivr.net/npm/@bootcss/v3.bootcss.com@1.0.31/dist/css/bootstrap.min.css" rel="stylesheet">
    <title>认证</title>
</head>

<body>

<form action="" method="post">
    <p>
         username: <input type="text" id="username" name="username">
    </p>

     <p>
         password: <input type="password" id="password" name="password">
    </p>

     <p>
         <button class="btn">login</button>
    </p>

</form>


</body>


</html>